ACR Laboratory


Advanced Concepts Research Laboratory Electrical and Computer Engineering Department University of Waterloo

Our Philosophy


A researcher without a vision is like a robot, no matter how sophisticated can both be


Our research philosophy is summarised by a proven good old engineering recipe:

First, realize the physics, then add a pinch of mathematics, a dash of common sense, a generous portion of good attitude, and top it off with a sliver of good approximations. Put all in a blender, let it brew a bit and then savor the outcome...

Survival through science and engineering

Research Team


Omar M. Ramahi

Professor and Director

Ahmed Ashoor

PhD Graduate Research Assistant

Thamer Almoneef

Visiting Scholar

Maged Aldhaeebi

PhD Graduate Research Assistant

Ali Albishi

PhD Graduate Research Assistant

Mohammed Saeed Aldosari

MASc Graduate Research Assistant

Abdulrahman Aloraynan

PhD Graduate Research Assistant

Dawood Alsaedi

PhD Graduate Research Assistant

Saeed Bamatraf

PhD Graduate Research Assistant

Amine Boussada

MEng Student

Mohamed El Badawe

PhD Graduate Research Assistant

Faruk Erkmen

PhD Graduate Research Assistant

Seyed H. Mirjahanmardi

PhD Graduate Research Assistant

Vahid Nayyeri

Assistant Professor, IUST

Melad Olaimat

PhD Graduate Research Assistant

Former Members


(updated April 2017)

to all alumni and alumnae, please send your professional affiliation and will update this page accordingly


Former PhD Students


Thamer S. Almoneefi, Visiting Scholar, University of Waterloo

PhD,  University of Waterloo, Spring 2017

Thesis: Electromagnetic Energy Transduction Using Metamaterials and Antennas


Abdulbaset Ali

PhD,  University of Waterloo, Spring 2017

Thesis: Intelligent Microwaves Detectionof Surface and Sub-Surface Anomalies


Miguel Angel Ruphuy, Assistant Professor, Universidad de Costa Rica

PhD,  University of Waterloo, Spring 2016

Thesis: Electrically Thin Lenses and Reflectors.


Mohammed AlShareef, Assistant Professor, King Abdulaziz City for Science and Technology

PhD, University of Waterloo, Fall 2014

Thesis: Electrically Small Particles for Energy Harvesting in the Infrared and Microwave Regimes.

 

Zhao Ren, Data Analyst, Pure Technologies

PhD, University of Waterloo, Fall 2013

Thesis: Microwave Near-Field Probes to Detect Electrically Small Particles


Babak Alavikia, Sr. Antenna Engineer, EMSCAN Corporation

PhD, University of Waterloo, Spring 2011

Thesis: Hybrid Computational Algorithms for the Problem of Scattering from Grating Structures


Mohammed Bait-Suwailam, Assistant Professor, Sultan Qaboos University

PhD, University of Waterloo, Winter 2011

Thesis: Metamaterials for Decoupling Antennas and Electromagnetic Systems


Hussein Attia, Assistant Professor, King Fahd University of Petroleum and Minerals

PhD, University of Waterloo, Spring, 2011

Thesis: Artificial Magnetic Material for High Gain Planar Antennas.


Ali Kabiri, Senior Scientist, 4Catalyzer

PhD, University of Waterloo, Spring 2010

Thesis: Artificial Magnetic Materials: Limitations, Synthesis and Possibilities.


Leila Yousefi, Assistant Professor, University of Tehran

PhD, University of Waterloo, Spring 2009

University of Waterloo

Thesis: Theory, Design and Development of Artificial Magnetic Materials.


Muhammed S. Boybay, Assistant Professor, Antalia University.

PhD, University of Waterloo, Spring 2009

University of Waterloo

Thesis: Sensitivity Enhancement of Near-Field Probes using Negative Materials.

 

Baharak Mohajer-Iravani, PhD, Fall 2007

University of Maryland

Thesis: Electromagnetic Bandgap (EBG) Structures for Noise Mitigation in Chasses and Packages.


Mohammad Kermani, Senior Design Engineering Manager, Cadence

PhD, University of Maryland at College Park,  Fall 2006

Thesis: The ADI-FDTD Method for High Accuracy Electrophysics Problems


Jie Qin, 

PhD, University of Maryland at College Park,  Fall 2006

Thesis: Planar Electromagnetic Bandgap (EBG) Structures for Noise Mitigation in High Speed Circuits.


Shahrooz Shahparnia, Hardware Architect, Apple

PhD, University of Maryland at College Park,  Fall 2005

Thesis: Electromagnetic Bandgap Structures for Broadband Noise Mitigation in High-Speed Packages.


Lin Li, 

PhD, University of Maryland at College Park,  Spring 2004

Thesis: Analysis and Mitigation of Electromagnetic Noise in Resonant Cavities and Apertures


Xin Wu, Chief Technology Officer and General Manager, High Speed Interconnect Solutions

PhD, University of Maryland at College Park,  Fall 2003

Thesis: Developing Highly Accurate and Stable Open-Region Electromagnetic Simulations


Telesphor Kamgaing, Research Scientist, Intel

PhD, University of Maryland at College Park,  Fall 2003

Thesis: High-Impedance Electromagnetic Surfaces for Mitigation of Switching Noise in High-Speed Circuits  


Former MS Students, Post-Doctoral Fellow and Visiting Professors.

 

Hu (Hugo) Sun, 

Visiting Scholar, University of Waterloo (2013-2015)

Topic: RFID Antennas

 

Khawla Alzoubi, Lecturer, Qatar University

Post-Doctoral Fellow, University of Waterloo (2012-2014)

Topic: Development of Portable Automated Intelligent Systems for Continuous Oxygen

Monitoring and Adjustment Oxygen Delivery for Hypoxic Patients.

 

Humayra Naosaba, Associate Network Engineer, Rogers

MASc, University of Waterloo, Fall 2014

Thesis: Negative Material Inspired Microwave Water Heating System.

 

Abdulaziz Ali Alqahtani, 

MASc, University of Waterloo, Winter 2014

Thesis: Electrically Small Probe for Near-field Detection Applications


Vahid Nayyeri, Assistant Professor, Iran University of Science and Technology

Visiting Scholar. September 2012-April 2013.

Research Topic: Numerical Modelling of Graphene

 

Ahmed Ashoor, PhD Candidate, University of Waterloo

MASc, University of Waterloo, Fall 2012

Thesis: Artificial Neural Networks for Microwave Detection


Ali Albishi, PhD Candidate, University of Waterloo

MASc, University of Waterloo, Spring 2012

Thesis: Detection of Sub-Millimeter Surface Cracks using Complementary Split-Ring Resonator


Thamer S. Almoneef, Visiting Scholar University of Waterloo

MASc, University of Waterloo, Spring 2012

Thesis: Antennas and Metamaterials for Electromagnetic Energy Harvesting


Na'el Suwan, Radio Frequency System Designer, Syntronic

MASc, University of Waterloo, Fall 2011

Thesis: Investigation of RF Direct Detection Architecture Circuits for Metamaterial Sensor Applications.


Mani Kashanianfard, PhD Candidate, University of Michigan

MASc, University of Waterloo, Spring 2009

Thesis: Electromagnetic Wave Transmission through sub-Wavelength Channels and Bends using Metallic Wires.


Samer Abdullah

MASc, University of Waterloo, Fall 2007

Co-supervised by Professor Kostadinka Bizheva (Department of Physics and Astronomy)

Thesis: Finite-Difference Time-Domain Simulations of Light Scattering from Retinal Photoreceptors.


Abhinav Pathak

MS, University of Maryland at College Park, Spring 2006


Omar Amin

MS, University of Maryland at College Park, Spring 2006

Thesis: Design of a Wireless Fish Lengthening Board for Fisheries Research


Shahrooz Shahparnia

MS, University of Maryland at College Park, Spring 2005


Baharak Mohajer-Iravani

MS, University of Maryland at College Park, Spring 2004

Thesis: Coupling Reduction using Electromagnetic Band Gap Structures in Enclosures and Cavities


Vinay Subramanian

MS, University of Maryland at College Park, Fall 2002

Thesis: Modeling and Prediction of Switching Noise in High-Speed Circuits and Packages


Vijaya Chebolu

MS, University of Maryland at College Park, Fall 2002

Thesis: Frequency-Domain Simulation of Open-Region Radiation and Scattering Problems using the Complementary Operators Method

Research


Teaching


the mystery and miracles of teaching



to open windows

to unlock doors

to shatter barriers...

to transform

to unleash the power of the mind

to create discomfort...

to create questions

to demystify

to challenge

to change...

to continue...

to create

to empower

to live...


above all

to survive.




Courses taught at the University of Waterloo

2016

ECE 207, Signals and Systems, Fall 2016, undergraduate course

ECE 675, Radiation and Propagation of Electromagnetic Field, Fall 2016, graduate course

ECE 106, Physics of Electrical Engineering I, Spring 2016, undergraduate 1st year course

GENE 123, Electrical Engineering for Civil Engineers, Winter 2016, undergraduate 1st year course

2015

ECE 207, Signals and Systems, Winter 2015, undergraduate 2nd year course; 

ECE 475/770, Electromagnetic Radiation and Propagation, Combined undergraduate-graduate course

2014

ECE 770, Special Topics: Artificial Electromagnetic Media and Metamaterial, Fall 2014, graduate course

ECE 106, Physics of Electrical Engineering, Winter 2014, undergraduate 1st year course

GENE 123, Electrical Engineering for Civil Engineers, Winter 2014, undergraduate 1st year course

2013

ECE 106, Physics of Electrical Engineering I, Spring 2013, undergraduate 1st year course

ECE 375, Electromagnetic Fields and Waves, Spring 2013, undergraduate 3rd year course

ECE 675, Radiation and Propagation of Electromagnetic Fields, Fall 2013, graduate course

2011

ME 123, Electrical Engineering for Mechanical Engineers, Spring 2011, undergraduate 1st year course

2010

ECE 770, Special Topics: Introduction to Electromagnetic Interference and Compatibility, Fall 2010, graduate course

ECE 370,   Electromagnetic Fields, Spring 2010, undergraduate 3rd year course  

2009

ECE 675, Radiation and Propagation of Electromagnetic Field, Fall 2009, graduate course

ECE 370, Electromagnetic Fields, Winter 2009, undergraduate 3rd year course

ME 123, Electrical Engineering for Mechanical Engineers, Winter 2009, undergraduate 1st year course   

2008

ECE 770, Introduction to Electromagnetic Interference and Compatibility, Spring 2008, graduate course.

ECE 476, Antennas and Radiating Systems, Winter 2008, undergraduate 4th year elective course   

2007

ME 123, Electrical Engineering for Mechanical Engineers, Spring 2007, undergraduate 1st year course

ECE 370, Electromagnetic Fields, Spring 2007, undergraduate 3rd year course

ME 123, Winter 2007

2006

ECE 675, Radiation and Propagation of Electromagnetic Field, Fall 2006, graduate course            

2005

ECE 675, Radiation and Propagation of Electromagnetic Field, Fall 2005



Courses taught at the University of Maryland

 2005

ENME 350, Electronics and Instrumentation I, Spring 2005, undergraduate 3rd year course 

2004

ENME 808V, Advanced Packaging for Signal Integrity and Electromagnetic Interference Control, Fall 2004, graduate course           

ENME 350, Fall 2004

ENME 350, Spring 2004

2003

ENME 350, Fall 2003

2002

ENME 808V, Advanced Packaging for Signal Integrity and Electromagnetic Interference Control, 

Fall 2002, graduate course

ENME 350, Fall 2002

ENME 489E, Solar Decathlon, Spring 2002, undergraduate 3rd/4th year course

ENME 350, Spring 2002

2001

ENME 489E, Fall 2001

ENME 350, Fall 2001

ENME 489E, Spring 2001

ENME 350, Spring 2001

Teaching

Publications


Journal Papers

Learn More

Conference Papers

Learn More

Conference Abstracts

Learn More

Interviews and Other Articles

Learn More

Workshops and Short Courses

Learn More

News


News

April 2, 2018
Congratulations to Mohamed El Badawe on the successful defense of his PhD thesis
Unfortunately the robe was missing at the time of defense so the robing ceremony will most likely take place after Mohamed's final seminar.


July 26, 2017
Congratulations to Thamer on the successful defense of his PhD thesis
Thamer can be seen here after the robing ceremony unofficially declaring him a Doctor.
pictured from the left, Maged Al-Otaibi, Prof. Omar Ramahi, Prof. Chris Backhouse, Thamer Almoneef, Ahmed Ashoor and half of Ali Albishi



April 12, 2017
Congratulations to Abdulbaset Ali on the successful defence of his PhD Thesis
Well done Abdulbaset

 IEEE AP-S Symposium
July 9-14, 2017
San Diego, CA, USA
http://2017apsursi.org/



META’17, the 8th International Conference on Metamaterials, Photonic Crystals and Plasmonics 

Songdo Convensia, Incheon - Seoul, South Korea 

July 25, 2017 – July 28, 2017 

http://metaconferences.org/ocs/index.php/META17



SENSET2017
SENSORS, NETWORKS, SMART and EMERGING TECHNOLOGIES
12-14 September 2017, Mövenpick Hotel, Beirut - Lebanon
http://www.senset2017.com/

Drop us a note


  • 200 University Avenue West, Waterloo, ON, Canada

Content Page


  1. M. El Badawe and O. M. Ramahi, “Efficient Metasurface Rectenna for Electromagnetic Wireless Power Transfer and Energy Harvesting,” Progress In Electromagnetics Research, Vol. 161, pp. 35–40, 2018. 
  2. A. Z. Ashoor, T. S. Almoneef and O. M. Ramahi, “A Planar Dipole Array Surface for Electromagnetic Energy Harvesting and Wireless Power Transfer,” IEEE Transaction on Microwave Theory and Techniques, Vol. 66, No. 3, pp. 1553-1560, March 2018.
  3. T. S. Almoneef, F. Erkmen, M. A. Alotaibi and O. M. Ramahi, “A New Approach to Microwave Rectennas using Tightly Coupled Antennas,” IEEE Transactions on Antennas and Propagation,  Vol. 66, No. 4, pp. 1714-1724, April 2018.
  4. A. Albishi and O. M. Ramahi, “Highly Sensitive Microwaves Sensors for Fluid Concentration Measurements,” IEEE Microwave and Wireless Components Letters, Vol. 28, No. 4, pp. 287-289, April 2018. Featured in IEEE Microwave Newsletter, 21 March 2018 (only five papers featured in the newsletter).
  5. F. Erkmen, T. S. Almoneef and O. M. Ramahi, “Scalable Electromagnetic Energy Harvesting using Frequency Selective Surfaces,IEEE Trans. Microwave Theory and Tech., Vol. 66, No. 5, pp. 2433-2441, May 2018. Featured in IEEE Microwave Newsletter, 21 March 2018 (only five papers featured in the newsletter).
  6. M. Feizi, V. Nayyeri and O. M. Ramahi, “Modeling Magnetized Graphene in the Finite-Difference Time-Domain Method using an Anisotropic Surface Boundary Condition,” IEEE Transactions on Antennas and Propagation, Vol. 66, No. 1, pp. 233-241, Jan. 2018.
  7. T. S. Almoneef, F. Erkmen, and O. M. Ramahi, “Harvesting the Energy of Multi-Polarized Electromagnetic Waves,” Scientific Reports, Vol. 7, No. 14656, (2017).  Doi: 10.1038/s41598-017-15298-5.
  8. M-J. Haji-Ahmadi, V. Nayyeri, M. Soleimani and O. M. Ramahi, “Pixelated Checkerboard Metasurface for Ultra-Wideband Radar Cross Section Reduction,” Scientific Reports, Vol. 7, No. 11437 (2017). doi:10.1038/srep28626.
  9. H. Sun, B. Tao and O. M. Ramahi, “Offset-Fed Folded Dipole and Its Application as RFID Tag Antenna,” IEEE Journal of Radio Frequency Identification, Vol. 1, No. 2, pp. 109-114, June 2017.
  10. T. S. Almoneef and O. M. Ramahi, “Dual-Polarized Multi-Band Infrared Energy Harvesting Using H-Shaped Metasurface Absorber,” Progress In Electromagnetics Research C, Vol. 76, pp. 1–10, 2017.
  11. A. Alighanbari, R. Hajitashakori, and O. M. Ramahi, “Curved Coupled Line Resonators for Microwave Filter Applications,” Microwave and Optical Technology Letters, Vol. 59, pp. 2012–2016, August 2017. https://doi.org/10.1002/mop.30662.
  12. S-M. Sadrpour, V. Nayyeri, M. Soleimani, and O. M. Ramahi, “A New Efficient Unconditionally Stable Finite-Difference Time-Domain Solution of the Wave Equation,” IEEE Transactions on Antennas and Propagation, Vol. 65, No. 6, pp. 3114-3121, Jun 2017.  Erratum, IEEE Transactions on Antennas and Propagation, Vol. 65, No. 11, pp. 6197, Nov. 2017.
  13. A. Albishi and O. M. Ramahi, “Microwaves-Based High Sensitivity Sensors for Crack Detection in Metallic Materials,” IEEE Transactions on Microwave Theory and Techniques, Vol. 65, No. 5, pp. 1864-1872, May 2017. (invited paper).
  14. F. Erkmen, T. Almoneef and O. M. Ramahi, “Electromagnetic Energy Harvesting Using Full-wave Rectification,” IEEE Transactions on Microwave Theory and Techniques, Vol. 65, No. 5, pp. 1843-1851, May 2017. (invited paper).
  15. S. M. Rouzegar, A. Alighanbari and O. M. Ramahi, “Wideband Uniplanar Artificial Magnetic Conductors Based on Curved Coupled Microstrip Line Resonators,” IEEE Microwave and Wireless Components Letters, Vol. 27, No. 4, pp. 326-328, April 2017.
  16. M. El Badawe, T. S. Almoneef and O. M. Ramahi, “A Metasurface for Conversion of Electromagnetic Radiation to DC,” AIP Advances, Vol. 7, No. 3, pp. 035112-10, 2017; doi: 10.1063/1.4978321.
  17. D. Alsaedi, M. Irannejad, K. H. Ibrahim, A. Almutairi, O. M. Ramahi and M. Yavuz, “High-Responsivity Reduced Graphene Oxide Gel Photodetectors for Visible-Light Detection with large Detection Area and End-Contact Interface,” Journal of Material Chemistry C, Vol. 5, pp. 882-888, 2017. 
  18. H. Sun, B. Tao and O. M. Ramahi, “Proximity Coupled Cavity Backed Patch Antenna for Long Range UHF RFID Tag,” IEEE Trans. Antennas and Propagation, Vol. 64, No. 12, pp. 5446-5449, Dec. 2016.
  19. M. Ruphuy and O. M. Ramahi, “Cost-Effective Monostatic Cloaking,” Journal of Applied Physics, Vol. 120, pp. 185303-5, Nov. 2016. doi: 10.1063/1.4967160.
  20. R. Ramzan, O. Siddiqui, W. Arshad, and O. M. Ramahi, “A Complex Permittivity Extraction Method Based on Anomalous Dispersion,” IEEE Transactions on Microwave Theory and Techniques, Vol. 64, No. 11, pp. 3787-3796, Nov. 2016
  21. A. Ali, M. El Badawe and O. M. Ramahi, “Microwave Imaging of Subsurface Flaws in Coated Metallic Structures Using Complementary Split-Ring Resonators,” IEEE Journal of Sensors, Vol. 16, No. 18, pp. 6890-6898, July 2016. doi: 10.1109/JSEN.2016.2587738.
  22. M. Ruphuy and O. M. Ramahi, “Spherical Aberration in Electrically-Thin Flat Lenses,” Journal of the Optical Society of America A, Vol. 33, No. 8, pp. 1531-1536, August 2016.
  23. O. Siddiqui, R. Ramzan, M. Amin and O. M. Ramahi, “Non-Invasive Phase Sensor for Permittivity and Moisture Estimation Based on Anomalous Dispersion,” Scientific Reports, Vol. 6, No. 28626 (2016). doi:10.1038/srep28626.
  24. A. Ali, A. Moomen and O. M. Ramahi, “Reducing Sweeping Frequencies in Microwave NDT Employing Machine Leaning Feature Selection,” Sensors. Vol. 16, No. 559, 2016. doi:10.3390/s16040559.
  25. T. Almoneef, H. Sun and O. M. Ramahi, “A 3-Dimensional Folded Dipole Antenna Arrays for Electromagnetic Energy Harvesting,” IEEE Antenna and Wireless Propagation Letters, Vol. 15, pp. 1406-1409, 2016.
  26. K. Alzoubi, Z. Alguraan, and O. M. Ramahi, “Portable Automated Oxygen Administration System for Hypoxaemic Patients,” SpringerPlus Journal of Medical Systems, Vol. 5, No. 470, 2016.
  27. M. Ruphuy and O. M. Ramahi, “Refraction in Electrically-thin Inhomogeneous Media,” Journal of the Optical Society of America A, Vol. 33, No. 4, pp. 538-543, April 2016.
  28. M. El Badawe, T. S. Almoneef and O. M. Ramahi, “A True Metasurface Antenna,” Scientific Reports, Vol. 6, 19268; doi: 10.1038/srep19268 (2016).
  29. B. Alavikia, T. S. Almoneef and O. M. Ramahi, “Wideband Resonator Arrays for Electromagnetic Energy Harvesting and Wireless Power Transfer,” Applied Physics Letters. Vol. 107, pp. 243902-5, 2015.
  30. A. Ashoor and O. M. Ramahi, “Dielectric Resonator Antennas for Electromagnetic Energy Harvesting,” Progress in Electromagnetic Research C, Vol. 59, pp. 89–99, 2015.
  31. B. Tao, H. Sun and O. M. Ramahi, “RFID Tag Antennas for Metallic and non-Metallic Surfaces,” Progress in Electromagnetic Research C, Vol. 59, pp. 51–57, 2015.
  32. L. R. Ramzan, O. Siddiqui, A. Nauroze, and O. M. Ramahi, “A Microstrip Probe Based on Electromagnetic Energy Tunneling for Extremely Small and Arbitrarily Shaped Dielectric Samples,” IEEE Antennas and Propagation Waves Letters, Vol. 14, pp. 1554-1556, 2015.
  33. M. Ruphuy, O. Siddiqui and O. M. Ramahi, “Flat Lenses and Reflectors,” Journal of the Optical Society of America A, Vol. 32, No. 9, pp. 1700-1706, Sept. 2015. (Amongst JOSA-A Top Downloads for September 2015.)
  34. B. Alavikia, T. Almoneef and O. M. Ramahi, “Complementary Split Ring Resonator Arrays for Electromagnetic Energy Harvesting,” Applied Physics Letters, Vol. 107, pp. 033902-5, July 2015.
  35. B. Alavikia, A. Kabiri and O. M. Ramahi, “Poynting Theorem Constraints on the Signs of the Imaginary Parts of the Electromagnetic Constitutive Parameters: Reply to Comment,” Journal of the Optical Society of America A, Vol. 32, No. 8, pp. 1566-01, August 2015.
  36. A. Ali, B. Hu and O. M. Ramahi, “Intelligent Detection of Cracks in Metallic Surfaces using Waveguide Sensor Loaded with Metamaterial Elements,” Sensors, Vol. 15, No. 5, pp. 11402-11416, May 2015.
  37. T. Almoneef and O. M. Ramahi, “Metamaterial Electromagnetic Energy Harvester with Near Unity Efficiency,” Applied Physics Letters, Vol. 106, pp. 153902-4, April 2015. (APL Editor’s Pick for 2015; featured in APL press release that was covered by 14 technology news outlets around the world; most read article in APL for the month of May 2015. One of the Most Read Paper in APL for 2016).
  38. O. Siddiqui, M. Kashanianfard and O. M. Ramahi, “Dielectric Sensors Based on Electromagnetic Energy Tunneling,” Sensors, Vol. 15, No. 4, pp. 7844-7856, 2015.
  39. T. Almoneef and O. M. Ramahi, “Split-Ring Resonator Arrays for Electromagnetic Energy Harvesting,” Progress in Electromagnetic Research B, Vol. 62, pp. 167–180, 2015.
  40. B. Alavikia, A. Kabiri, and O. M. Ramahi, “Poynting Theorem Constraints on the Sign of the Imaginary Parts of the Electromagnetic Constitutive Parameters,” Journal of the Optical Society of America A Vol. 32, No. 4, pp. 522-532, April 2015.
  41. M. Ruphuy and O. M. Ramahi, “Analytical Models for Electrically Thin Flat Lenses and Reflectors,” Journal of the Optical Society of America A, Vol. 32, No. 4, pp. 507–513, April 2015.
  42. A. Kabiri and O. M. Ramahi, “Generic Building Blocks for Construction of Artificial Magnetic Media,” Progress in Electromagnetic Research B, Vol. 62, pp. 17–28, 2015.
  43. A. Albishi and O. M. Ramahi, “Detection of Surface and Subsurface Cracks in Metallic and non-Metallic Materials using Complementary Split-Ring Resonator,” Sensors, Vol. 14, No. 10, pp. 19354-19370; Oct. 1, 2014.
  44. Z. Ren, A. Kabiri and O. M. Ramahi, “Detection of Localized Magnetostatic Surface Resonant Spheres,” IEEE Transactions on Magnetics, Vol. 50, No. 10, Oct. 2014.
  45. M. AlShareef and O. M. Ramahi, “Electrically Small Particles Combining Even- and Odd-Mode Currents for Microwave Energy Harvesting,” Applied Physics Letters. Vol. 104, pp. 253906-4; doi: 10.1063/1.4885776. 
  46. M. Bait-Suwailam, B. Alavikia, and O. M. Ramahi, “Reduction of Electromagnetic Radiation From Apertures and Enclosures Using Electromagnetic Bandgap (EBG) Structures,” IEEE Transactions on Components, Packaging and Manufacturing Technology, Vol. 4, No. 5, pp. 929-937, May 2014.
  47. T. S. Almoneef and O. M. Ramahi, “A 3-Dimensional Stacked Metamaterial Array for Electromagnetic Energy Harvesting, Progress in Electromagnetic Research, Vol. 146, pp. 109–115, 2014.
  48. M. Alshareef and O. M. Ramahi, “Energy Harvesting in the Microwaves Spectrum Using Electrically Small Resonator,”  International Congress on Energy Efficiency and Energy Related Materials (ENEFM2013), Springer Proceedings in Physics, Vol. 155, pp 265-272, May 2014.
  49. V. Nayyeri, M. Soleimani and O. M. Ramahi, “A Method to Model Thin Conductive Layers in the Finite-Difference Time-Domain Method,” IEEE Transactions on Electromagnetic Compatibility, Vol. 56, No. 2, pp. 385-392, April 2014.
  50. B. Hu, Z. Ren, M. S. Boybay and O. M. Ramahi, “Waveguide Probe Loaded with Split Ring Resonators for Crack Detection in Metallic Surfaces,” IEEE Transactions on Microwaves Theory and Techniques, Vol. 62, No. 4, pp. 871-878, April 2014.
  51. B. Alavikia, T. S. Almoneef and O. M. Ramahi, “Electromagnetic Energy Harvesting using Complementary Split-Ring Resonators,” Applied Physics Letters, Vol. 104, No. 16, pp. 163903-4, 2014.
  52. M. Alhazmi, F. Aydinoglu, B. Cui, O. M. Ramahi, M. Irannejad, A. Brzezinski and M. Yavuz, “NSTOA-13-RA-108 Comparison of the Effects of Varying of Metal Electrode in Metal-Insulator-Metal Diodes with multi-dielectric layers,” Austin J Nanomed Nanotechnol, Vol. 2, No. 2, pp. 1-4, 2014.
  53. F. Aydinoglu, M. Alhazmi, B. Cui, O. M. Ramahi, and M. Yavuz, “Higher Performance Metal-Insulator- Metal Diodes using Multiple Insulator Layers,” Austin J Nanomed Nanotechnol, Vol. 1, No. 1, pp. 1-3, 2014.
  54. M. Ruphuy, Z. Ren and O. M. Ramahi, “Flat Far-Field Lenses and Reflectors,” Progress in Electromagnetic Research M, Vol. 34, pp. 163-170, 2014.
  55. B. Mohajer-Iravani and O. M. Ramahi, “On the Suppression band and bandgap of Planar Electromagnetic Bandgap (EBG) Structures,” International Journal of Antennas and Propagation. Vol. 2014, Article ID 164107, 11 pages, http://dx.doi.org/10.1155/2014/164107.
  56. V. Nayyeri, M. Soleimani and O. M. Ramahi, “Wideband Modeling of Graphene using the Finite-Difference Time-Domain Method,” IEEE Transactions on Antennas and Propagation.  Vol. 61, No. 12, pp. 6107-6114, Dec. 2013.
  57. M. AlShareef and O. M. Ramahi, “Electrically Small Resonators for Energy Harvesting in the Infrared Regime,” J. Appl. Phys., Vol. 114, pp. 223101-5, 2013.
  58. V. Nayyeri, M. Soleimani and O. M. Ramahi, “Modeling of Graphene as a Conducting Sheet in the Finite-Difference Time-Domain Method,” IEEE Transaction on Antennas and Propagation, Vol. 61, No. 8, pp. 4176-4181, Aug.  2013.
  59. H. Attia, O. Siddiqui and O. M. Ramahi, “Beam Tilting of Single Microstrip Antenna using High Permittivity Superstrate,” Microwave and Optical Technology Letters, Vol. 55, No. 7, July 2013.
  60. A. Kabiri and O. M. Ramahi, “Design Methodology for Synthesizing Artificial Magnetic Materials using Generic Broken Loops,” Progress in Electromagnetic Research, Vol. 140, pp. 125-129, 2013.
  61. M. Bait-Suwailam, L. Yousefi, B. Alavikia and O. M. Ramahi, “Analytical Models for Predicting the Effective Permittivity of Complementary Split-Ring Resonators,” Microwave and Optical Technology Letters, Vol. 55, No. 7, pp. 1565-1569, July 2013.
  62. M. S. Boybay and O. M. Ramahi, “Non-Destructive Thickness Measurement using Quasi-Static Resonators,” IEEE Microwave and Wireless Components Letters, Vol. 23, No. 4, pp. 217-219, April 2013.

B. Alavikia, N. Soltani and O. M. Ramahi, “An Efficient Two-Dimensional Finite-Difference Frequency-Domain Method for Switching Noise Analysis in Multi-layer Boards,” IEEE Transactions on Components, Packaging and Manufacturing Technology, Vol. 3, No. 5, pp. 841-848, May 2013.

H. Attia, O. Siddiqui, N. Suwan and O. M. Ramahi, “Analytical and experimental study of gain enhancement in antenna arrays covered with high index metamaterial superstrate,” Microwave and Optical Technology Letters, Vol. 55, No. 1, pp. 215–218, Jan. 2013.

O. M. Ramahi, T. Almoneef, M. AlShareef and M. S. Boybay, “Metamaterial Particles for Electromagnetic Energy Harvesting,” Appl. Phys. Lett., Vol. 101, No. 17, pp. 173903-8, 2012.

M. S. Boybay and O. M. Ramahi, “Material Characterization using Complementary Split-Ring Resonators,” IEEE Transactions on Instrumentations and Measurements, Vol. 61, No. 11, pp. 3039-3046, Nov. 2012.

          Erratum to “Material Characterization Using Complementary Split-Ring Resonators,” IEEE Transaction on Instrumentation and Measurements, Vol. 62, No. 6, pp. 1866, June 2013.

B. Alavikia and O. M. Ramahi, “Electromagnetic Scattering from Finite and Infinite Array of Two-Dimensional Overfilled Cavities in a Conductive Surface using a Hybrid Finite Element-Surface Integral Equation Method,” J. Opt. Soc. Am. A, Vol. 29, No. 11, pp. 2444-2450, Nov. 2012.

A. Albishi, M. S. Boybay and O. M. Ramahi, “Complementary Split-Ring Resonator for Crack Detection in Metallic Surfaces,” IEEE Microwave and Wireless Components Letters, Vol. 22, No. 6, pp. 330-332, June 2012.

B. Alavikia and O. M. Ramahi, “Coupling Interactions in Electromagnetic Scattering from Finite Array of Cavities with Stratified Dielectric Coating,” J. Opt. Soc. Am. A, Vol. 29, No. 6, pp. 1132-1140, June 2012.

M. Bait-Suwailam and O. M. Ramahi, “Ultrawide band mitigation of simultaneous switching noise and EMI reduction in high-speed PCBs using complementary split-ring resonators,” IEEE Transactions on Electromagnetic Compatibility, Vol. 54, No. 2, pp. 389-396, April 2012.

A. Kabiri, L. Talbi and O. M. Ramahi, “Modeling of Magnetostatic Resonances in Small-Size Metamaterial,” Journal of Applied Physics A, Vol. 107, No. 1, pp. 145-148, Feb. 2012. (Invited Paper)

B. Alavikia and O. M. Ramahi, “Electromagnetic Scattering from Cylindrical Objects above a Conductive Surface using a Hybrid Finite-Element Surface Integral Equation Method,” The Journal of the Optical Society of America A, Vol. 28, No. 12, pp. 2510-2518, Dec. 2011.

B. Alavikia and O. M. Ramahi, “Hybrid finite element-boundary integral algorithm to solve the problem of scattering from finite array of cavities with multi-layer stratified dielectric coating,” The Journal of the Optical Society of America A, Vol. 28, No. 10, pp. 2092-2099, October 2011.

H. Attia, L. Yousefi and O. M. Ramahi, High Gain Patch Antennas Loaded with High Characteristic Impedance Superstrates,” IEEE Antennas and Wireless Propagation Letters, Vol. 10, pp. 858–861, Aug. 2011.

B. Alavikia and O. M. Ramahi, “Semi-Analytic Solution to the Problem of Scattering from Multiple Cylinders above a Perfectly Conductive Surface,” Journal of the Optical Society of America A, Vol. 28, No. 7, pp. 1489-1495, July 2011.

B. Yang, X. Shao, N. Goldsman, O. M. Ramahi, and P. N. Guzdar, “Investigation of the On-Chip MISM Interconnects with the Alternating-Direction-Implicit Finite-Difference Time-Domain Method,” Microwave and Optical Technology Letters, Vol. 53, No. 7, pp. 1582-1585, July 2011.

B. Alavikia and O. M. Ramahi, “Hybrid finite element-boundary integral algorithm to solve the problem of scattering from finite and infinite array of cavities with stratified dielectric coating,” Journal of the Optical Society of America, A, Vol. 28, No. 6, pp. 1022-1031, June 2011.

M. S. Boybay and O. M. Ramahi, “Open-Ended Coaxial Line Probes with Negative Permittivity Materials,” IEEE Transactions on Antennas and Propagation, Vol. 59, No. 5, pp. 1765-1769, May 2011.

H. Attia, L. Yousefi and O. M. Ramahi, “Analytical Model for Calculating the Radiation Field of Microstrip Antennas with Artificial Magnetic Superstrates: Theory and Experiment,” IEEE Transactions on Antennas and Propagation, Vol. 59, No. 5, pp. 1438-1445, May 2011.

Z. Ren, M. S. Boybay and O. M. Ramahi, “Near-Field Probes for Sub-surface Detection using Split-Ring Resonators,” IEEE Transactions on Microwave Theory and Techniques, Vol. 59, No. 2, pp. 488-495, Feb. 2011.

L. Yousefi, M. S. Boybay and O. M. Ramahi, “Characterization of Metamaterial using a Strip Line Fixture,” IEEE Transactions on Antennas and Propagation, Vol. 59, No. 4, pp. 1245-1253, April, 2011.

B. Alavikia and O. M. Ramahi, “An Efficient Method using Finite Elements and the Surface Integral Equation to Solve the Problem of Scattering from Infinite Periodic Conducting Grating,” Radio Science, Vol. 46, RS1001, doi:10.1029/2010RS004466, 2011.

A. Kabiri and O. M. Ramahi, “nth Order Rose Curve as a Generic Candidate for RF Artificial Magnetic Material,” Journal of Applied Physics A, Special Issue on Advances in Metamaterials and Photonics, Vol. 103, Issue 3, pp.831-834. (Published online on January 5, 2011.)

Z. Ren, M. S. Boybay and O. M. Ramahi, “Near-Field Subsurface Detection using Metamaterial Inspired Probes,” Journal of Applied Physics A, Special Issue on Advances in Metamaterials and Photonics, Vol. 103, No. 3, pp. 839-842.(Published online on January 5, 2011)

H. Attia, L. Yousefi, O. Siddiqui and O. M. Ramahi, “Analytical Formulation of the Radiation Field of Printed Antennas in the Presence of Artificial Magnetic Superstrates,” Journal of Applied Physics A, Special Issue on Advances in Metamaterials and Photonics, (Published online on January 6, 2011.)

O.  Siddiqui and O. M. Ramahi, “A Novel Dielectric Detection System Based on Wire-loaded Waveguides,” IEEE Microwave and Wireless Components Letters, Vol. 21, No. 2, pp. 113-115, Feb. 2011.

H. Attia, M. Bait-Suwailam, and O. M. Ramahi, “Enhanced Gain Planar Inverted-F Antenna with Metamaterial Superstrate for UMTS Applications,” PIERS ONLINE, vol. 6, no. 6, pp. 585-588, 2010.

H. Attia, O. F. Siddiqui, O. M. Ramahi, “Artificial magneto-superstrates for gain and efficiency improvement of microstrip antenna arrays,” PIERS ONLINE, vol. 6, no. 6, pp. 555-558, 2010.

A. Kabiri, Q. He, M. H. Kermani and O. M. Ramahi, “Design of a Controllable Delay Line,” IEEE Transactions on Advanced Packaging, Vol. 33, No. 4, pp. 1080-1087, Nov. 2010.

B. Alavikia and O. M. Ramahi, “Fundamental Limitation on the use of Open-Region Boundary Conditions and Matched Layers to Solve the Problem of Gratings in Metallic Screen,” Journal of the Applied Computational Electromagnetic Society, Vol. 25, No. 8, pp. 652-658, August 2010.

M. Bait-Suwailam and O. M. Ramahi, “Mutual Coupling Reduction Between Axial-Mode Helical Antennas using Single-Negative (SNG) Magnetic Metamaterials, The Journal of Engineering Research, Vol. 7, No. 2, pp. 59-68, 2010.

M. Bait-Suwailam, O. Siddiqui and O. M. Ramahi, “Mutual Coupling Reduction between Microstrip Patch Antennas using Slotted Complementary Split-Ring Resonators,” IEEE Antennas and Wireless Propagation Letters, pp. 876 – 878, Vol. 9, 2010.

M. Bait-Suwailam, M. S. Boybay and O. M. Ramahi, “Electromagnetic Coupling Reduction in High-Profile Antennas using Single-Negative (SNG) Metamaterials for MIMO Applications,” IEEE Transactions on Antennas and Propagation, Vol. 58, No. 9, pp. 2894 – 2902, Sept. 2010.

O. Siddiqui, M. Kashanianfard and O. M. Ramahi, “Frequency-Selective Energy Tunneling in Wire-Loaded Narrow Waveguide Channels,” PIER Letters, Vol. 15, pp. 153-161, 2010. 

L. Yousefi and O. M. Ramahi, “Artificial Magnetic Material using Fractal Hilbert Curves,” IEEE Transactions on Antennas and Propagation, Vol. 58, No. 8, pp. 2614 – 2622, August 2010. 

A. Kabiri, L. Yousefi and O. M. Ramahi, “On the Fundamental Limitations of Artificial Magnetic Materials,” IEEE Transaction on Antennas and Propagation, Vol. 58, No. 7, pp. 2345-2353, July 2010.

L. Yousefi and O. M. Ramahi, “Miniaturized Antennas using Artificial Magnetic Materials with Fractal Hilbert Inclusions,”  Electronics Letters., Vol. 46, No. 12, pp. 816-817, June 2010.

S. Shahparnia, B. Mohajer-Iravani and O. M. Ramahi, “Prediction of the Gap in Electromagnetic Band-Gap Structures in a Parallel-Plate Waveguide Environment,” Microwave and Optical Technology Letters, Vol. 52, No. 8, pp. 1792-1795, May 2010. 

S. S. Abdallah, A. Iolov, K. Bizheva and O. M. Ramahi, “Effect of numerical dispersion on the FDTD solution of light scattering from photoreceptor cells,” Journal of the Applied Computational Electromagnetic Society.  Vol. 25, No. 5, May 2010.

M. Bait-Suwailam and O. M. Ramahi, “Simultaneous Switching Noise Mitigation in High-Speed Circuits using Complementary Split-Ring Resonators,” Electronics Letters, Vol. 46 No. 8, p.563–564, April 2010.

B. Alavikia and O. M. Ramahi, “Electromagnetic scattering from multiple sub-wavelength apertures in metallic screens using the surface integral equation method,” Journal of the Optical Society of America A, Vol. 27, No. 4, pp. 815-826, March 2010.

B. Mohajer-Iravani and O. M. Ramahi, “Wideband circuit models for EBG structures,” IEEE Transactions on Advanced Packaging, Vol. 33, No. 1, pp. 169-179, Feb. 2010.

M. S. Boybay and O. M. Ramahi, “Experimental and numerical study of sensitivity improvement in near field probes using single negative media,” IEEE Transactions on Microwave Theory and Techniques. Vol.  57, No. 12, pp. 3427-3433, Dec.  2009.

M. H. Attia, L. Yousefi, M. B. Suwailam, M. S. Boybay and O. M. Ramahi, “Enhanced Gain Microstrip Antenna using Artificial Magnetic Superstrates,” IEEE Antennas and Wireless Propagation Letters, Vol. 8, pp. 1198-1201, 2009.

A. Kabiri, M. M. Bait-Suwailam, M. H. Kermani, and O. M. Ramahi, "The effect of loss-tangent on laddering behavior in delay lines," Progress in Electromagnetic Research Letters, Vol. 12, pp. 161-170, 2009.

M. S. Boybay and O. M. Ramahi, “Waveguide Probes using Single Negative Media,”  IEEE Microwave and Wireless Components Letters, Vol. 19, No. 10, pp. 541-643, Oct. 2009.

F. Seydou, O. M. Ramahi and T. SeppÄanen, “Finite-size annular photonic crystals: Numerical computation and analysis of the bandgap,” Journal of Engineering Mathematics, Vol. 65, pp. 243-255, July 2009.

B. Alavikia and O. M. Ramahi, “Finite-element solution of the problem of scattering from cavities in metallic screens using the surface Integral Equation as a boundary constraint,”  Journal of the Optical Society of America A, Vol. 26, No. 9, pp. 1915-1925, Sept. 2009.

F. Seydou, T. SeppÄanen and O. M. Ramahi, “Computation of the Helmholtz Eigenvalues in a class of chaotic cavities using the multipole expansion approach,” IEEE Transaction on Antennas and Propagation, Vol. 57, No. 4, pp. 1169-1177, April 2009.

M. H. Kermani and O. M. Ramahi, “Theory, Analytical Investigation, and Performance of the Complementary Derivatives Method for Reducing Reflection Errors from Multi-Grid Domains in Finite-Difference Methods,” Radio Science. Vol. 44, March 2009.

L. Yousefi, H. Attia and O. M. Ramahi, “Broadband Experimental Characterization of Artificial Magnetic Materials based on a Microstrip Line Method,” Progress in Electromagnetics Research, Vol. 90, pp.1-13, 2009.

M. S. Boybay and O. M. Ramahi, “Near-field Probes using Single and Double Negative Media,” Physical Review E, No. 79, pp. 016602, 2009.

T. Kamgaing and O. M. Ramahi, “Spiral-Based Electromagnetic Band-Gap Structures for Applications in Small Form Factor Multichip Module Packages,” IEEE Transactions on Microwave Theory and Techniques, Vol. 56, No. 10, pp. 2293-2300, Oct. 2008.

M. Fakharzadeh, O. M. Ramahi, S. Safavi-Naeini, and S. K. Chaudhuri, “Design and Analysis of Meandering Photonic Crystals Delay Lines,” IEEE Transactions on Advanced Packaging, Vol. 31, No. 2, pp. 311-319, May 2008.

F. Seydou,  O. M. Ramahi and T. SeppÄanen, “Quasi-Analytical Computation of Energy Levels and Wave Functions in a Class of Chaotic Cavities with Inserted Objects,” in Mathematical Modeling, Simulation, Visualization and e-Learning, Dialla Konate, ed., pp. 3-15, Springer Berlin Heidelberg, 2007/8. (Book Chapter)

X. Wu, D. Cullen, G. Brist and O. M. Ramahi, “Surface finish effects on high speed signal degradation,” IEEE Transaction on Advanced Packaging, Vol. 31, No. 1, pp. 182-189, Feb. 2008.

B. Mohajer-Iravani and O. M. Ramahi, “Suppression of EMI and Electromagnetic Noise in Packages using Embedded Capacitance and Miniaturized Electromagnetic Bandgap Structures with high-k Dielectrics,” IEEE Transaction on Advanced Packaging, Vol. 30, No. 4, pp. 776-788, Nov. 2007.

M. H. Kermani and O. M. Ramahi, “Application of the Complementary Derivatives Method in the ADI-FDTD Solution of Maxwell’s Equations,” IEEE Transaction on Antennas and Propagation, Vol. 55, No. 8, pp. 2294-2301, Aug. 2007.

J. Qin, O. M. Ramahi and V. Granatstein, Novel planar electromagnetic bandgap structures for wideband noise suppression and EMI reduction in high speed circuits,” IEEE Transaction on Electromagnetic Compatibility, Vol. 49, No. 3, pp. 661-669, Aug. 2007.

L. Yousefi, B. Mohajer-Iravani and O. M. Ramahi, “Enhanced Bandwidth Artificial Magnetic Ground Plane for Low-Profile Antennas,” IEEE Antennas and Wireless Propagation Letters, Vol. 6, pp. 289-292, June 2007.

S. Shahparnia and O. M. Ramahi, “Design, implementation and testing of miniaturized electromagnetic bandgap structures for broadband switching noise mitigation in high-speed PCBs,” IEEE Transactions on Advanced Packaging, Vol. 30, No. 2, pp. 171-179 May 2007.

F. Seydou, O. M. Ramahi, R. Duraiswami and T. SeppÄanen, “Numerical computation of the Green's function for two-dimensional finite-size photonic crystals of infinite length,” Optics Express. vol. 14, No. 23, pp. 11362-11371, Nov. 13, 2006.

M. Fakharzadeh, S. Safavi-Naeini, S. K. Chaudhuri and O. M. Ramahi, “Miniaturized photonic crystal delay lines for beamforming of phased array systems,” The Mediterranean Journal of Electronics Communication, Vol. 2, No. 4, Oct. 2006.

J. Qin and O. M. Ramahi, “Ultra-wideband mitigation of simultaneous switching noise using novel planar electromagnetic bandgap structures,” IEEE Microwave and Wireless Component Letters, Vol. 16, No. 9, pp. 487-489, Sept. 2006.

B. Mohajer-Iravani, S. Shahparnia and O.  M. Ramahi, “Coupling reduction in enclosures and cavities using electromagnetic band gap structures,” IEEE Transactions on Electromagnetic Compatibility, Vol. 48, No. 2, pp. 292-303, May 2006.

M. H. Kermani and O. M. Ramahi, “The complementary derivatives method: A second-order accurate interpolation scheme for non-uniform grid in FDTD simulation,” IEEE Microwave and Wireless Components Letters, Vol. 16, No. 2, pp. 60-62, Feb. 2006.

O. M. Ramahi and L. Li, “Analysis and reduction of electromagnetic field leakage through loaded apertures: A numerical study,” Electromagnetics Journal, Vol. 25, No.  7-8, pp. 679-693, October-December 2005.

S. Shahparnia and O. M. Ramahi, “A simple and effective model for electromagnetic bandgap structures embedded in printed circuit boards,” IEEE Microwave and Wireless Components Letters, Vol. 15, No. 10, pp. 621-623, Oct. 2005.

N-T. Kim and O. M. Ramahi, “Power Amplifier Design Using Negative-Image Device Models,” Microwave and Optical Technology Letters, Vol. 47, No. 2, pp. 197-201, Oct. 2005.

X. Wu and O. M. Ramahi, “Application of C-COM to the Absorption of Evanescent Waves in Waveguides,” IEEE Microwave and Wireless Components Letters, Vol. 15, No. 10, pp. 697-699, Oct. 2005. 

T. Kamgaing and O. M. Ramahi, “Design and modeling of high-impedance electromagnetic surfaces for switching noise suppression in power planes,” IEEE Transactions on Electromagnetic Compatibility, Vol. 47, No. 3, pp. 479-489, Aug. 2005.

S. Shahparnia and O. M. Ramahi, “Miniaturized Electromagnetic Bandgap Structures for Broadband Switching Noise Suppression in PCBs,” Electronics Letters, Vol. 41, No. 9, pp. 519-520, April 2005.

O. M. Ramahi, S. Shahparnia and B. Mohajer-Iravani, “Electromagnetic band gap material: Exotic stuff for not-so-exotic EMI/EMC applications,” Interference Technology – The Annual EMC Guide 2004, Item Publications.

S. Shahparnia and O. M. Ramahi, “Electromagnetic interference (EMI) reduction from printed circuit boards (PCB) using electromagnetic bandgap structures,” IEEE Transactions on Electromagnetic Compatibility, Vol. 46, No. 4, pp. 580-587, Nov. 2004.

X. Wu and O. M. Ramahi, “Effect of weighting and damping coefficients on the accuracy of Higdon-based absorbing boundary conditions,” Microwave and Optical Technology Letters, Vol. 41, No. 6, pp. 446-668, June 2004.

O. M. Ramahi, V. Chebolu, and X. Wu,  “Concurrent complementary operators method for two-dimensional time-harmonic simulation of radiation and scattering problems,” IEEE Transactions on Antennas and Propagation, Vol. 52, No. 2, pp. 408-415, Feb. 2004.

S. Shahparnia and O. M. Ramahi, “Simultaneous switching noise mitigation in printed circuit boards using cascaded high-impedance surface,” Electronics Letters, Vol. 40, No. 2, pp. 98-99, Jan. 2004.

O. M. Ramahi, “Analysis of conventional and novel delay lines: A numerical study,” Journal of Applied Computational Electromagnetic Society, Vol. 18, No. 3, pp. 181-190, Nov. 2003.

O. M. Ramahi, V. Subramanian, and B. Archambeault, “Simple and efficient finite-difference frequency-domain algorithm for study and analysis of power plane resonance and simultaneous switching noise in printed circuit boards and chip packages,” IEEE Transactions on Advanced Packaging Vol. 26, No. 2, pp. 191-198, May 2003. 

T. Kamgaing  and O. M. Ramahi, “A novel power plane with integrated simultaneous switching noise mitigation capability using high impedance surface,”  IEEE Microwave and Wireless Components Letters, Vol. 13, No. 1, pp. 21-23,  Jan. 2003.

L. Li, J. Xie, O. M. Ramahi, M. Pecht, and B. J. Donham, “Airborne operation of portable electronic devices,” IEEE Antennas and Propagation Magazine, Vol. 44, No. 4, pp. 30-39, Aug 2002.

O. M. Ramahi, “Concurrent complementary operators for mesh truncation in frequency domain simulations,” IEEE Microwave and Wireless Components Letters, Vol. 12, No. 3, pp. 99-101, March 2002.  

X. Wu and O. M. Ramahi, “Application of the concurrent complementary operators method to numerically-derived absorbing boundary conditions,” Microwave and Optical Technology Letters, Vol. 32, No. 4, pp. 272-275, Feb. 2002.

O. M. Ramahi, “Frequency-domain complementary operators for finite elements simulation,” IEEE Transactions on Antennas and Propagation, Vol. 48, No. 4, pp. 629-631, April 2000.

O. M. Ramahi, “Absorbing boundary conditions for the three-dimensional vector wave equation,” IEEE Transactions on Antennas and Propagation, Vol. 47, No. 11, pp. 1735-1736, Nov. 1999.  

O. M. Ramahi, “Absorbing boundary conditions for convex object-conformable boundaries,” IEEE Transactions on Antennas and Propagation, Vol. 47, No. 7, pp. 1141-1145, July 1999.  

O. M. Ramahi, “Stability of absorbing boundary conditions,” IEEE Transactions on Antennas and Propagation, Vol. 47, No. 4, pp. 593-599, April 1999.

O. M. Ramahi, “Exact implementation of higher order Bayliss-Turkel absorbing boundary operators in finite-elements simulation,” IEEE Microwave and Guided Wave Letters, Vol. 8, No. 11, pp. 360-362, Nov. 1998.

O. M. Ramahi, “The concurrent complementary operators method for FDTD mesh truncation,” IEEE Transactions on Antennas and Propagation, Vol. 46, No. 10, pp. 1475-1482, Oct. 1998. 

J. Schneider, C. L. Wagner, and O. M. Ramahi, “Implementation of transparent sources in FDTD Simulations,” IEEE Transactions on Antennas and Propagation, Vol. 46, No. 8, pp. 1159-1168, Aug. 1998.

J. Schneider and O. M. Ramahi, “The complementary operators method applied to acoustic finite difference time domain simulations,” J. Acoustical Soc. Am., Vol. 104, No. 2, pp. 686-693, Aug. 1998.   

O. M. Ramahi, A. Z. Elsherbeni and C. Smith, “Dynamic analysis of V transmission lines,” IEEE Transactions Component Packaging and Manufacturing Tech., Part B: Advanced Packaging, Vol. 21, No. 3, pp. 250-257, Aug. 1998. 

O. M. Ramahi, A. Khebir, and R. Mittra, ‘Comments on "A super absorbing boundary condition for the analysis of waveguide discontinuities with finite-difference method",' IEEE Microwave and Guided Wave Letters, Vol. 8, No. 5, pp. 208, May 1998.

O. M. Ramahi and J. Schneider, “Comparative study of the PML and COM,” IEEE Microwave and Guided Wave Letters, Vol. 8, No. 1, pp. 55-57, Feb. 1998.

O. M. Ramahi, “Extension of the concurrent COM mesh-truncation technique to 3D FDTD simulations,” Microwave and Optical Technology Letters, Vol. 17, No. 4, pp. 244-247, March 1998.

O. M. Ramahi, “The complementary operators method in FDTD simulations,” IEEE Antennas and Propagation Magazine, Vol. 39, No. 6, pp. 33-45, Dec. 1997.

O. M. Ramahi, “Concurrent implementation of the complementary operators method in 2D space,” IEEE Microwave and Guided Wave Letters, Vol. 7, No. 6, June 1997.

O. M. Ramahi, “Stable FDTD solutions with higher order ABCs,” Microwave and Optical Tech. Letters, Vol. 15, No. 3, pp. 132-134, June 1997.

O. M. Ramahi, “Near- and far- field calculations in FDTD simulations using Kirchhoff's Surface Integral Representation,” IEEE Transactions on Antennas and Propagation, Vol. 45, No. 5, pp. 753-759, May 1997.

O. M. Ramahi, “Complementary boundary operators for wave propagation problems,” J. Computational Physics, Vol. 133, pp. 113-128, 1997.

O. M. Ramahi, “ABCs: from theory to practice,” Applied Computational Electromagnetics Society Newsletter, Vol. 11, No. 1, March 1996. (Invited)

O. M. Ramahi and B. Archambeault, “Adaptive absorbing boundary conditions in finite difference time domain applications for EMC simulations,” IEEE Transactions Electromagnetic Compatibility, Vol. 37, No. 4, Nov. 1995.

O. M. Ramahi, “Complementary operators: A method to annihilate artificial reflections arising from the truncation of the computational domain in the solution of partial differential equations,” IEEE Transactions on Antennas and Propagation, Vol. AP-43, No. 7, pp. 697-704, July 1995.

O. M. Ramahi “Application of the complementary operator method to the finite difference time domain solution of the three-dimensional radiation problem,” Microwave and Optical Technology Letters, Vol. 9, No. 3, pp. 147-149, June 1995.

O. M. Ramahi and Y. T. Lo, “Superstrate effect on the resonant frequency of microstrip antennas,” Microwave and Optical Tech. Letters, Vol. 5, No. 6, pp. 254-257, June 1992.  

O. M. Ramahi, A. Khebir and R. Mittra, “Numerically-derived absorbing boundary conditions for the solution of open region scattering problems,” IEEE Transactions on Antennas and Propagation, Vol. AP-39, No. 3, pp. 350-353, March 1991.

          [This paper was selected for reprint in the book Finite Element for Wave Electromagnetics, Editors: P. P. Silvester and G. Pelosi, IEEE Press, New York, 1994.] 

O. M. Ramahi and R. Mittra, “A surface integral equation method for the finite element solution of waveguide discontinuity problems,” IEEE Transactions Microwave Theory Techniques, Vol. MTT-39, No. 3, pp. 604-608, March 1991.

O. M. Ramahi and R. Mittra, “Finite element solution for a class of unbounded geometries,” IEEE Transactions on Antennas and Propagation, Vol. AP-39, No. 2, pp. 244-250, February 1991.

[This paper was selected for reprint in the book Finite Element for Wave Electromagnetics, Editors: P. P. Silvester and G. Pelosi, IEEE Press, New York, 1994.]

A. Khebir, O. M. Ramahi, and R. Mittra, “An efficient partial differential equation technique for solving the problem of scattering by objects of arbitrary shape,” Microwave and Optical Tech. Letters, Vol. 2, No. 7, pp. 229-233, July 1989.

R. Mittra, O. M. Ramahi, A. Khebir, R. Gordon, and A. Kouki, “A review of absorbing boundary conditions for two and three-dimensional electromagnetic scattering problems,” IEEE Transactions Magnetics, Vol. 25, No. 4, pp. 3034-3039, July 1989.

O. M. Ramahi and R. Mittra, “Finite-element analysis of dielectric scatterers using the absorbing boundary condition,” IEEE Transactions on Magnetics, Vol. 25, No. 4, pp. 3043-3045, July 1989.

          [This paper was selected for reprint in the book Finite Element for Wave Electromagnetics, Editors: P. P. Silvester and G. Pelosi, IEEE Press, New York, 1994.]

O. M. Ramahi and R. Mittra, “Design of a matching network for an HF antenna using the real frequency method,” IEEE Transactions on Antennas and Propagation, Vol. AP-37, No. 4, pp. 506-509, April 1989.  

R. Mittra and O. M. Ramahi, “Absorbing boundary conditions for the direct solution of partial differential equations arising in electromagnetic scattering problems,” in Finite Element and Finite Difference Methods in Electromagnetic Scattering, M. Morgan, ed., Vol. II, New York, N.Y.: Elsevier Science, Inc., 1989.